US5028094A - Brake regulator - Google Patents
Brake regulator Download PDFInfo
- Publication number
- US5028094A US5028094A US07/509,114 US50911490A US5028094A US 5028094 A US5028094 A US 5028094A US 50911490 A US50911490 A US 50911490A US 5028094 A US5028094 A US 5028094A
- Authority
- US
- United States
- Prior art keywords
- piston
- regulator
- push rod
- rest
- brake
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
- B60T8/26—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force characterised by producing differential braking between front and rear wheels
- B60T8/30—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force characterised by producing differential braking between front and rear wheels responsive to load
- B60T8/306—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force characterised by producing differential braking between front and rear wheels responsive to load using hydraulic valves
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T11/00—Transmitting braking action from initiating means to ultimate brake actuator without power assistance or drive or where such assistance or drive is irrelevant
- B60T11/10—Transmitting braking action from initiating means to ultimate brake actuator without power assistance or drive or where such assistance or drive is irrelevant transmitting by fluid means, e.g. hydraulic
- B60T11/28—Valves specially adapted therefor
- B60T11/34—Pressure reducing or limiting valves
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
- B60T8/18—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to vehicle weight or load, e.g. load distribution
- B60T8/1812—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to vehicle weight or load, e.g. load distribution characterised by the means for pressure reduction
- B60T8/1831—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to vehicle weight or load, e.g. load distribution characterised by the means for pressure reduction pressure reducing or limiting valves
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
- B60T8/18—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to vehicle weight or load, e.g. load distribution
- B60T8/1837—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to vehicle weight or load, e.g. load distribution characterised by the load-detecting arrangements
- B60T8/1843—Arrangements for detecting air spring pressure
Definitions
- the present invention related to brake regulators for motor vehicles which make it possible to reduce the pressure of the brake fluid in the brake circuit of the rear wheels with respect to that of the brake fluid in the brake circuit of the front wheels as a function of the vehicle load.
- the invention relates more particularly to a load-controlled regulator of this type using a fluidic means connected, for example, to a hydrostatic cushion arranged close to the vehicle suspension system.
- Brake regulators of this type are well known in the art. Conventionally, they comprise a first piston capable of translatory movement in a bore formed in the body of the regulator, under the effect of the fluidic means. This first piston is provided with a push rod which cooperates with the end of a second piston forming part of a valve, for example a ball valve, which is open in the rest position and controls the passage of the brake fluid between a work chamber of the master cylinder and the brake circuit of the vehicle's rear wheels.
- a valve for example a ball valve
- the pressure is communicated entirely to the brake circuit. Then, when the pressure reaches a given value, the piston closes the valve by being slightly displaced. If the pressure in the master cylinder continues to rise, the valve opens and closes so as to increase proportionally the pressure in the brake circuit.
- the push rod exerts on the second piston a force opposite to that exerted by the brake fluid and thus delays the closure of the valve as a function of the vehicle load.
- Regulators of this type operate in a perfectly satisfactory manner.
- the pressure increase in the master cylinder causing the second piston, and, consequently, the push rod and the first piston, to move back counter to the fluid cushion results in a considerable increase in the value of the brake fluid pressure at which the valve normally closes, since everything happens as if the vehicle were under a greater load than it actually is, which is detrimental to safety as the rear wheels may then lock before the valve acts.
- the object of the invention is to eliminate these disadvantages by means of a device which is simple and inexpensive to implement.
- means for maintaining a given distance between the end of the second piston and the push rod at rest this distance being such that the second piston and the push rod do not enter into contact until just before the closure of the valve.
- the push rod is maintained, at rest, in axial abutment against a stationary part of the regulator body, the second piston being returned to rest by means of a simple spring resting on a stationary part of the regulator body.
- a spring is arranged between the push rod and the first piston.
- the second piston is at first able to slide freely without having to overcome the thrust exerted by the hydrostatic cushion, only the parasitic effect of the friction of the cups and the force of the return spring of the second piston having to be overcome.
- FIGURE shows diagrammatically in section a brake regulator in accordance with the present invention.
- the regulator comprises a body 1.
- a person skilled in the art will easily recognise the chamber 3 connected in a conventional manner to a hydrostatic cushion 50 placed close to the vehicle suspension system.
- a membrane 5 renders this chamber 3 leaktight with respect to the rest of the regulator, and rests on a piston 7 capable of sliding counter to a spring 9.
- the valve consists of a second piston 21 and a valve member 23, in this case a ball which is returned by a spring 25.
- a sealing cup 27 ensures sealing of the chamber 29 which is connected to the master cylinder 52 with respect to the outlet circuit connected to the brake motors of the rear wheels 54 when the valve is closed.
- a bush 31 is fixed inside the bore so as to constitute a stop for the push rod 33 cooperating with the first piston 7.
- the push rod 33 is provided with a head 35 facing the second piston 21.
- a threaded ring 37 is screwed onto this head 35 so as to form an annular distance piece between the head 35 of the push rod 33 and the bush 31.
- This ring makes it possible to adjust the height of the distance piece simply by means of screwing.
- a spring 41 is arranged so as to return the second piston 21 to rest, in the open position of the valve. In the example shown, this spring rests on the ring 37. It could, however, also rest on the bush 31.
- the push rod 33 is not integral with the piston 7, but cooperates with the latter via a spring 43 which enables the push rod 33 not to be in contact, at rest, with the piston 7 and makes it possible for the chamber 3 to expand as a function of the vehicle load while increasing the force exerted on the push rod 33 in a corresponding manner.
- the second piston 21 When the pressure of the brake fluid rises in the master cylinder, the second piston 21 is displaced in the direction of the head of the push rod 33 solely counter to the force exerted by the spring 41, the stiffness of which can be favorably chosen as a function of the minimum desired cut-off point of the regulator, that is to say of the pressure at which the valve is to close and of the force produced by the friction of the cups.
- the height of the distance piece 37 is chosen in such a manner that this contact is obtained between second piston 21 and head 35 while the second piston 21 still has 0.2 mm to travel in order to close the valve.
- the distance, at rest, between the head 35 of the push rod and the end of the second piston 21 was of the order of 3 mm.
- the compensator acts in a conventional manner.
Landscapes
- Engineering & Computer Science (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Hydraulic Control Valves For Brake Systems (AREA)
- Braking Arrangements (AREA)
Abstract
Description
Claims (4)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR8905659 | 1989-04-28 | ||
FR8905659A FR2646389A1 (en) | 1989-04-28 | 1989-04-28 | BRAKE CORRECTOR |
Publications (1)
Publication Number | Publication Date |
---|---|
US5028094A true US5028094A (en) | 1991-07-02 |
Family
ID=9381234
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US07/509,114 Expired - Fee Related US5028094A (en) | 1989-04-28 | 1990-04-16 | Brake regulator |
Country Status (6)
Country | Link |
---|---|
US (1) | US5028094A (en) |
EP (1) | EP0395462B1 (en) |
JP (1) | JPH02296564A (en) |
DE (1) | DE69002373T2 (en) |
ES (1) | ES2043301T3 (en) |
FR (1) | FR2646389A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5176434A (en) * | 1990-03-29 | 1993-01-05 | Bendix Europe Services Techniques | Brake pressure proportioning valve with an additional valve |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4315827A1 (en) * | 1993-05-12 | 1994-11-17 | Teves Gmbh Alfred | Brake pressure reducer |
Citations (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3329471A (en) * | 1965-09-17 | 1967-07-04 | Teves Gmbh Alfred | Braking-force regulator |
US3503657A (en) * | 1969-01-27 | 1970-03-31 | Bendix Corp | Dualratio load sensing proportioning valve |
DE2018538A1 (en) * | 1969-04-17 | 1970-10-22 | Girling Ltd., Birmingham (Grossbritannien) | Control valve |
JPS5918055A (en) * | 1982-07-20 | 1984-01-30 | Aisin Seiki Co Ltd | Live load sensing type hydraulic brake pressure controlling device for vehicle |
EP0156666A1 (en) * | 1984-02-22 | 1985-10-02 | BENDIX France | Brake pressure regulator |
FR2564401A1 (en) * | 1984-05-17 | 1985-11-22 | Dba | CONTROL DEVICE FOR BRAKE CORRECTOR |
EP0223641A1 (en) * | 1985-10-09 | 1987-05-27 | BENDIX France | Fluid-controlled brake pressure regulator |
GB2184803A (en) * | 1985-12-27 | 1987-07-01 | Magneti Marelli Spa | Brake system for motor vehicles provided with self-levelling suspensions with air springs |
GB2192146A (en) * | 1986-06-10 | 1988-01-06 | Peter N Jackson | A transverse clamp |
US4858999A (en) * | 1986-05-02 | 1989-08-22 | Alfred Teves Gmbh | Pressure control unit with locking device for dual circuit brake systems |
US4925251A (en) * | 1988-03-30 | 1990-05-15 | Bendix France | Brake corrector subject to the load of a vehicle as a function of the seating of the latter |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3622213A1 (en) * | 1986-07-02 | 1988-01-07 | Teves Gmbh Alfred | PRESSURE REGULATION DEVICE, IN PARTICULAR FOR PRESSURE-OPERABLE ACTUATORS |
-
1989
- 1989-04-28 FR FR8905659A patent/FR2646389A1/en active Pending
-
1990
- 1990-03-29 DE DE90400854T patent/DE69002373T2/en not_active Expired - Fee Related
- 1990-03-29 EP EP90400854A patent/EP0395462B1/en not_active Expired - Lifetime
- 1990-03-29 ES ES90400854T patent/ES2043301T3/en not_active Expired - Lifetime
- 1990-04-16 US US07/509,114 patent/US5028094A/en not_active Expired - Fee Related
- 1990-04-27 JP JP2110688A patent/JPH02296564A/en active Pending
Patent Citations (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3329471A (en) * | 1965-09-17 | 1967-07-04 | Teves Gmbh Alfred | Braking-force regulator |
US3503657A (en) * | 1969-01-27 | 1970-03-31 | Bendix Corp | Dualratio load sensing proportioning valve |
DE2018538A1 (en) * | 1969-04-17 | 1970-10-22 | Girling Ltd., Birmingham (Grossbritannien) | Control valve |
JPS5918055A (en) * | 1982-07-20 | 1984-01-30 | Aisin Seiki Co Ltd | Live load sensing type hydraulic brake pressure controlling device for vehicle |
US4615566A (en) * | 1984-02-22 | 1986-10-07 | Societe Anonyme D.B.A. | Braking corrector |
EP0156666A1 (en) * | 1984-02-22 | 1985-10-02 | BENDIX France | Brake pressure regulator |
FR2564401A1 (en) * | 1984-05-17 | 1985-11-22 | Dba | CONTROL DEVICE FOR BRAKE CORRECTOR |
US4629257A (en) * | 1984-05-17 | 1986-12-16 | Societe Anonyme D.B.A. | Braking corrector |
EP0223641A1 (en) * | 1985-10-09 | 1987-05-27 | BENDIX France | Fluid-controlled brake pressure regulator |
GB2184803A (en) * | 1985-12-27 | 1987-07-01 | Magneti Marelli Spa | Brake system for motor vehicles provided with self-levelling suspensions with air springs |
US4773712A (en) * | 1985-12-27 | 1988-09-27 | MAGNETI MARELLI S.p.A. | Brake corrector device for hydraulic brake system including control member responsive to suspension air springs of motor vehicle |
US4858999A (en) * | 1986-05-02 | 1989-08-22 | Alfred Teves Gmbh | Pressure control unit with locking device for dual circuit brake systems |
GB2192146A (en) * | 1986-06-10 | 1988-01-06 | Peter N Jackson | A transverse clamp |
US4925251A (en) * | 1988-03-30 | 1990-05-15 | Bendix France | Brake corrector subject to the load of a vehicle as a function of the seating of the latter |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5176434A (en) * | 1990-03-29 | 1993-01-05 | Bendix Europe Services Techniques | Brake pressure proportioning valve with an additional valve |
Also Published As
Publication number | Publication date |
---|---|
JPH02296564A (en) | 1990-12-07 |
DE69002373T2 (en) | 1993-11-18 |
FR2646389A1 (en) | 1990-11-02 |
EP0395462A1 (en) | 1990-10-31 |
ES2043301T3 (en) | 1993-12-16 |
EP0395462B1 (en) | 1993-07-28 |
DE69002373D1 (en) | 1993-09-02 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: BENDIX EUROPE SERVICES TECHNIQUES Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:LEVRAI, ROLAND;REEL/FRAME:005282/0885 Effective date: 19900330 |
|
FEPP | Fee payment procedure |
Free format text: PAYOR NUMBER ASSIGNED (ORIGINAL EVENT CODE: ASPN); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY |
|
FPAY | Fee payment |
Year of fee payment: 4 |
|
FEPP | Fee payment procedure |
Free format text: PAYOR NUMBER ASSIGNED (ORIGINAL EVENT CODE: ASPN); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY Free format text: PAYER NUMBER DE-ASSIGNED (ORIGINAL EVENT CODE: RMPN); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY |
|
FPAY | Fee payment |
Year of fee payment: 8 |
|
REMI | Maintenance fee reminder mailed | ||
LAPS | Lapse for failure to pay maintenance fees | ||
STCH | Information on status: patent discontinuation |
Free format text: PATENT EXPIRED DUE TO NONPAYMENT OF MAINTENANCE FEES UNDER 37 CFR 1.362 |
|
FP | Lapsed due to failure to pay maintenance fee |
Effective date: 20030702 |